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<FONT color="green">001</FONT>    /**<a name="line.1"></a>
<FONT color="green">002</FONT>     *<a name="line.2"></a>
<FONT color="green">003</FONT>     * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.3"></a>
<FONT color="green">004</FONT>     * contributor license agreements.  See the NOTICE file distributed with<a name="line.4"></a>
<FONT color="green">005</FONT>     * this work for additional information regarding copyright ownership.<a name="line.5"></a>
<FONT color="green">006</FONT>     * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.6"></a>
<FONT color="green">007</FONT>     * (the "License"); you may not use this file except in compliance with<a name="line.7"></a>
<FONT color="green">008</FONT>     * the License.  You may obtain a copy of the License at<a name="line.8"></a>
<FONT color="green">009</FONT>     *<a name="line.9"></a>
<FONT color="green">010</FONT>     *     http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a>
<FONT color="green">011</FONT>     *<a name="line.11"></a>
<FONT color="green">012</FONT>     *  Unless required by applicable law or agreed to in writing, software<a name="line.12"></a>
<FONT color="green">013</FONT>     *  distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a>
<FONT color="green">014</FONT>     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a>
<FONT color="green">015</FONT>     *  See the License for the specific language governing permissions and<a name="line.15"></a>
<FONT color="green">016</FONT>     *  limitations under the License.<a name="line.16"></a>
<FONT color="green">017</FONT>     */<a name="line.17"></a>
<FONT color="green">018</FONT>    package org.apache.commons.dbcp.managed;<a name="line.18"></a>
<FONT color="green">019</FONT>    <a name="line.19"></a>
<FONT color="green">020</FONT>    import java.sql.Connection;<a name="line.20"></a>
<FONT color="green">021</FONT>    import java.sql.SQLException;<a name="line.21"></a>
<FONT color="green">022</FONT>    import java.util.Map;<a name="line.22"></a>
<FONT color="green">023</FONT>    import java.util.WeakHashMap;<a name="line.23"></a>
<FONT color="green">024</FONT>    <a name="line.24"></a>
<FONT color="green">025</FONT>    import javax.transaction.Status;<a name="line.25"></a>
<FONT color="green">026</FONT>    import javax.transaction.SystemException;<a name="line.26"></a>
<FONT color="green">027</FONT>    import javax.transaction.Transaction;<a name="line.27"></a>
<FONT color="green">028</FONT>    import javax.transaction.TransactionManager;<a name="line.28"></a>
<FONT color="green">029</FONT>    import javax.transaction.xa.XAResource;<a name="line.29"></a>
<FONT color="green">030</FONT>    <a name="line.30"></a>
<FONT color="green">031</FONT>    <a name="line.31"></a>
<FONT color="green">032</FONT>    /**<a name="line.32"></a>
<FONT color="green">033</FONT>     * TransactionRegistry tracks Connections and XAResources in a transacted environment for a single XAConnectionFactory.<a name="line.33"></a>
<FONT color="green">034</FONT>     * &lt;/p&gt;<a name="line.34"></a>
<FONT color="green">035</FONT>     * The TransactionRegistry hides the details of transaction processing from the existing DBCP pooling code, and gives<a name="line.35"></a>
<FONT color="green">036</FONT>     * the ManagedConnection a way to enlist connections in a transaction, allowing for the maximal rescue of DBCP.<a name="line.36"></a>
<FONT color="green">037</FONT>     *<a name="line.37"></a>
<FONT color="green">038</FONT>     * @author Dain Sundstrom<a name="line.38"></a>
<FONT color="green">039</FONT>     * @version $Revision$<a name="line.39"></a>
<FONT color="green">040</FONT>     */<a name="line.40"></a>
<FONT color="green">041</FONT>    public class TransactionRegistry {<a name="line.41"></a>
<FONT color="green">042</FONT>        private final TransactionManager transactionManager;<a name="line.42"></a>
<FONT color="green">043</FONT>        private final Map caches = new WeakHashMap();<a name="line.43"></a>
<FONT color="green">044</FONT>        private final Map xaResources = new WeakHashMap();<a name="line.44"></a>
<FONT color="green">045</FONT>    <a name="line.45"></a>
<FONT color="green">046</FONT>        /**<a name="line.46"></a>
<FONT color="green">047</FONT>         * Creates a TransactionRegistry for the specified transaction manager.<a name="line.47"></a>
<FONT color="green">048</FONT>         * @param transactionManager the transaction manager used to enlist connections<a name="line.48"></a>
<FONT color="green">049</FONT>         */<a name="line.49"></a>
<FONT color="green">050</FONT>        public TransactionRegistry(TransactionManager transactionManager) {<a name="line.50"></a>
<FONT color="green">051</FONT>            this.transactionManager = transactionManager;<a name="line.51"></a>
<FONT color="green">052</FONT>        }<a name="line.52"></a>
<FONT color="green">053</FONT>    <a name="line.53"></a>
<FONT color="green">054</FONT>        /**<a name="line.54"></a>
<FONT color="green">055</FONT>         * Registers the association between a Connection and a XAResource.  When a connection<a name="line.55"></a>
<FONT color="green">056</FONT>         * is enlisted in a transaction, it is actually the XAResource that is given to the transaction<a name="line.56"></a>
<FONT color="green">057</FONT>         * manager.<a name="line.57"></a>
<FONT color="green">058</FONT>         *<a name="line.58"></a>
<FONT color="green">059</FONT>         * @param connection the JDBC connection<a name="line.59"></a>
<FONT color="green">060</FONT>         * @param xaResource the XAResource which managed the connection within a transaction<a name="line.60"></a>
<FONT color="green">061</FONT>         */<a name="line.61"></a>
<FONT color="green">062</FONT>        public synchronized void registerConnection(Connection connection, XAResource xaResource) {<a name="line.62"></a>
<FONT color="green">063</FONT>            if (connection == null) throw new NullPointerException("connection is null");<a name="line.63"></a>
<FONT color="green">064</FONT>            if (xaResource == null) throw new NullPointerException("xaResource is null");<a name="line.64"></a>
<FONT color="green">065</FONT>            xaResources.put(connection, xaResource);<a name="line.65"></a>
<FONT color="green">066</FONT>        }<a name="line.66"></a>
<FONT color="green">067</FONT>    <a name="line.67"></a>
<FONT color="green">068</FONT>        /**<a name="line.68"></a>
<FONT color="green">069</FONT>         * Gets the XAResource registered for the connection.<a name="line.69"></a>
<FONT color="green">070</FONT>         * @param connection the connection<a name="line.70"></a>
<FONT color="green">071</FONT>         * @return the XAResource registered for the connection; never null<a name="line.71"></a>
<FONT color="green">072</FONT>         * @throws SQLException if the connection does not have a registered XAResource<a name="line.72"></a>
<FONT color="green">073</FONT>         */<a name="line.73"></a>
<FONT color="green">074</FONT>        public synchronized XAResource getXAResource(Connection connection) throws SQLException {<a name="line.74"></a>
<FONT color="green">075</FONT>            if (connection == null) throw new NullPointerException("connection is null");<a name="line.75"></a>
<FONT color="green">076</FONT>            XAResource xaResource = (XAResource) xaResources.get(connection);<a name="line.76"></a>
<FONT color="green">077</FONT>            if (xaResource == null) {<a name="line.77"></a>
<FONT color="green">078</FONT>                throw new SQLException("Connection does not have a registered XAResource " + connection);<a name="line.78"></a>
<FONT color="green">079</FONT>            }<a name="line.79"></a>
<FONT color="green">080</FONT>            return xaResource;<a name="line.80"></a>
<FONT color="green">081</FONT>        }<a name="line.81"></a>
<FONT color="green">082</FONT>    <a name="line.82"></a>
<FONT color="green">083</FONT>        /**<a name="line.83"></a>
<FONT color="green">084</FONT>         * Gets the active TransactionContext or null if not Transaction is active.<a name="line.84"></a>
<FONT color="green">085</FONT>         * @return the active TransactionContext or null if not Transaction is active<a name="line.85"></a>
<FONT color="green">086</FONT>         * @throws SQLException if an error occurs while fetching the transaction<a name="line.86"></a>
<FONT color="green">087</FONT>         */<a name="line.87"></a>
<FONT color="green">088</FONT>        public TransactionContext getActiveTransactionContext() throws SQLException {<a name="line.88"></a>
<FONT color="green">089</FONT>            Transaction transaction = null;<a name="line.89"></a>
<FONT color="green">090</FONT>            try {<a name="line.90"></a>
<FONT color="green">091</FONT>                transaction = transactionManager.getTransaction();<a name="line.91"></a>
<FONT color="green">092</FONT>    <a name="line.92"></a>
<FONT color="green">093</FONT>                // was there a transaction?<a name="line.93"></a>
<FONT color="green">094</FONT>                if (transaction == null) {<a name="line.94"></a>
<FONT color="green">095</FONT>                    return null;<a name="line.95"></a>
<FONT color="green">096</FONT>                }<a name="line.96"></a>
<FONT color="green">097</FONT>    <a name="line.97"></a>
<FONT color="green">098</FONT>                // is it active<a name="line.98"></a>
<FONT color="green">099</FONT>                int status = transaction.getStatus();<a name="line.99"></a>
<FONT color="green">100</FONT>                if (status != Status.STATUS_ACTIVE &amp;&amp; status != Status.STATUS_MARKED_ROLLBACK) {<a name="line.100"></a>
<FONT color="green">101</FONT>                    return null;<a name="line.101"></a>
<FONT color="green">102</FONT>                }<a name="line.102"></a>
<FONT color="green">103</FONT>            } catch (SystemException e) {<a name="line.103"></a>
<FONT color="green">104</FONT>                throw (SQLException) new SQLException("Unable to determine current transaction ").initCause(e);<a name="line.104"></a>
<FONT color="green">105</FONT>            }<a name="line.105"></a>
<FONT color="green">106</FONT>    <a name="line.106"></a>
<FONT color="green">107</FONT>            // register the the context (or create a new one)<a name="line.107"></a>
<FONT color="green">108</FONT>            synchronized (this) {<a name="line.108"></a>
<FONT color="green">109</FONT>                TransactionContext cache = (TransactionContext) caches.get(transaction);<a name="line.109"></a>
<FONT color="green">110</FONT>                if (cache == null) {<a name="line.110"></a>
<FONT color="green">111</FONT>                    cache = new TransactionContext(this, transaction);<a name="line.111"></a>
<FONT color="green">112</FONT>                    caches.put(transaction, cache);<a name="line.112"></a>
<FONT color="green">113</FONT>                }<a name="line.113"></a>
<FONT color="green">114</FONT>                return cache;<a name="line.114"></a>
<FONT color="green">115</FONT>            }<a name="line.115"></a>
<FONT color="green">116</FONT>        }<a name="line.116"></a>
<FONT color="green">117</FONT>    <a name="line.117"></a>
<FONT color="green">118</FONT>        /**<a name="line.118"></a>
<FONT color="green">119</FONT>         * Unregisters a destroyed connection from {@link TransactionRegistry}<a name="line.119"></a>
<FONT color="green">120</FONT>         * @param connection<a name="line.120"></a>
<FONT color="green">121</FONT>         */<a name="line.121"></a>
<FONT color="green">122</FONT>        public synchronized void unregisterConnection(Connection connection) {<a name="line.122"></a>
<FONT color="green">123</FONT>            xaResources.remove(connection);<a name="line.123"></a>
<FONT color="green">124</FONT>        }<a name="line.124"></a>
<FONT color="green">125</FONT>    }<a name="line.125"></a>
<FONT color="green">126</FONT>    <a name="line.126"></a>




























































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